| METALS AND METAL MATRIX COMPOSITES |
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| Mechanism of the Effect of Prior Particle Boundary on Impact Toughness of FeCrAl Alloy |
| CHEN Yongqing1, YAN Yingjie1, CAO Rui1, LIU Gang1, QIN Wei2,3, CHE Hongyan2,3, WANG Tiejun2,3
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1 State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou University of Technology,Lanzhou 730050, China
2 Advanced Technology & Materials Limited Company, China Iron & Steel Research Institute Group, Beijing 100081, China
3 Engineering and Technology Research Center of Hot Isostatic Pressing, Zhuozhou 072750, China |
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Abstract The effect of prior particle boundary (PPB) in the FeCrAl alloy prepared by powder metallurgy on the impact toughness is undefined. Mechanism about the effect of PPB on the impact toughness of FeCrAl alloy was investigated by microstructure analysis and in-situ tensile test. The results showed that prior particle boundary precipitations were mainly niobium carbonitrides. During deformation, cracks initiation and propagation in niobium carbonitrides along prior particle boundaries and lead to partial intergranular fracture, low grain-boundary strength and brittle fracture of FeCrAl alloy prepared by powder metallurgy.
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Published: 23 March 2021
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| Fund:National Natural Science Foundation of China (51961024, 51761027). |
About author:: Yongqing Chen, studied at Lanzhou University of Technology in 2017, and pursued a master's degree under the guidance of Professor Cao Rui and Yan Yingjie. The main research direction is preparation of FeCrAl alloy and research on its microstructure and properties.
Yingjie Yan, obtained his Ph. D. degree from University of Science and Technology Beijing in 2015. He is currently an associate professor of Lanzhou University of Technology. His research interest is material strengthening and toughness. |
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2021, Vol. 35 
